URL Encode

最新推荐文章于 2025-05-16 13:20:38 发布

原创最新推荐文章于 2025-05-16 13:20:38 发布 · 4.3k 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#url #php #c #os #rest #class

用VC实现post数据常常会遇到URL编码问题

在此封装一个工具类进行UTF8编码的转换

源码来自php source code

只是简单的封装给C++调用

//URL 编解码类
//来自PHP源码
class CRtUrlConv
{
public:
	static char *urlencode(const char *in_str ) 
	{ 
		char *out_str; 
		int in_str_len, out_str_len; 
		in_str_len=strlen(in_str); 
		out_str_len=0; 
		out_str =  php_url_encode( in_str , in_str_len, &out_str_len); 
		return (char *) out_str; 
	}
	static int urldecode(char *s)
	{
		return php_url_decode(s);
	}
private:
	static char *php_url_encode(const char *s , int len , int *new_length) 
	{ 
		register unsigned char c; 
		unsigned char *to, *start; 
		unsigned char const *from, *end; 
		from = (unsigned char *)s; 
		end = (unsigned char *)s + len; 
		start = to = new unsigned char[3*len+1];
		while (from < end) { 
			c = *from++;  
			if (c == ' ') { 
				*to++ = '+'; 
#ifndef CHARSET_EBCDIC 
			} else if ((c < '0' && c != '-' && c != '.') || 
				(c < 'A' && c > '9') || 
				(c > 'Z' && c < 'a' && c != '_') || 
				(c > 'z')) { 
					to[0] = '%'; 
					to[1] = HEXCHARS[c >> 4]; 
					to[2] = HEXCHARS[c & 15]; 
					to += 3; 
#else /*CHARSET_EBCDIC*/ 
			} else if (!isalnum(c) && strchr("_-.", c) == NULL) { 
				/* Allow only alphanumeric chars and '_', '-', '.'; escape the rest */ 
				to[0] = '%'; 
				to[1] = HEXCHARS[os_toascii[c] >> 4]; 
				to[2] = HEXCHARS[os_toascii[c] & 15]; 
				to += 3; 
#endif /*CHARSET_EBCDIC*/ 
			} else { 
				*to++ = c; 
			} 
		} 
		*to = 0; 
		if (new_length) { 
			*new_length = to - start; 
		} 
		return (char *) start; 
	} 
	static int php_url_decode(char *str) 
	{ 
		int len; 
		char *dest = str; 
		char *data = str; 
		len=strlen(str); 
		while (len--) { 
			if (*data == '+') { 
				*dest = ' '; 
			} 
			else if (*data == '%' && len >= 2 && isxdigit((int) *(data + 1))  
				&& isxdigit((int) *(data + 2))) { 
#ifndef CHARSET_EBCDIC 
					*dest = (char) php_htoi(data + 1); 
#else 
					*dest = os_toebcdic[(char) php_htoi(data + 1)]; 
#endif 
					data += 2; 
					len -= 2; 
				} else { 
					*dest = *data; 
				} 
				data++; 
				dest++; 
		} 
		*dest = '/0'; 
		return dest - str; 
	}
	static int php_htoi(char *s) 
	{ 
		int value; 
		int c; 
		c = ((unsigned char *)s)[0]; 
		if (isupper(c)) 
			c = tolower(c); 
		value = (c >= '0' && c <= '9' ? c - '0' : c - 'a' + 10) * 16; 
		c = ((unsigned char *)s)[1]; 
		if (isupper(c)) 
			c = tolower(c); 
		value += c >= '0' && c <= '9' ? c - '0' : c - 'a' + 10; 
		return (value); 
	} 
	static const char hexchars[];
	static const char HEXCHARS[];
};
const char CRtUrlConv::hexchars[] = "0123456789abcdef"; 
const char CRtUrlConv::HEXCHARS[] = "0123456789ABCDEF";
}